Patent GB-742060-A (GB)
Title: Improvements in and relating to looms
IPC: D03D47/26
Filed: 1953-01-12
Abstract: 742,060. Shuttleless looms; spool-winding machines. JUILLARD, Y., JUILLARD, J., and JUILLARD, J. P. Jan. 12, 1953, No. 935/53. Classes 120 (2) and 142 (2). A succession of spools lays single pick lengths of weft in sheds travelling wave-like across the loom, the spools being returned by a conveyer to be rewound. A shedding mechanism for weaving patterns and one for plain weaving are described. Stop motions operate on weft failure in the spool-winding mechanism and if a spool becomes caught in the shed. Conveying and propelling spools, Fig. 4.- Except when they are passing through the shed, the spools 33 are circulated by an endless belt 25 having conical studs 30 engaging dimples in the spools; fixed guides (not shown) hold the spools against the belt. When they reach the warp, the spools are guided away from the belt and roll in the apex of the shed, being guided by reed blades 102 and propelled by magnets 18 carried by an endless belt 12 ; the magnets are connected in series by contacts (not shown) on their flanges 22a, connection to the power supply being made by brushes 20 at each end of the shed; where the belt 12 passes round pulleys 13, the circuit is interrupted since the flanges 22a lose contact with one another. Shedding and beat-up mechanism, Fig. 4.- Blades 81 rocked about a shaft 80 by cams 78  beat up the weft, the high points of the cams being disposed helically to produce a wave-like action. Sliding healds 85 are bifurcated to embrace waists 84 of rods 83 attached to the blades 81, the healds having constrictions 87 which can snap over the waists to couple the healds to the rods. Patterning is effected by an endless band 95 carrying stops 91 which can block movement of the healds to the left, anticlockwise rocking of a rod 83 merely resulting in it snapping out of the constrictions of those of its healds that are blocked, and snapping into them again when the rod moves clockwise; if there is no stop 91 opposite a heald, the rod 83 remains in the constriction and moves the heald. In a modification for plain weaving only, the pattern band 91 is omitted and the cams 78 are disposed so that alternate high points lie on one helix and the intervening ones on a second helix diametrically opposite the first, whereby alternate warp threads are shed in opposite directions. The blades 81 have elongated holes for the shaft 80 and completely surround the cams 78, by which they are given a movement into the top of the shed, a downward movement to beat up the weft, and a withdrawing movement out of the shed, each pick being beaten up by alternate blades only. Winding spools.-The empty spools are taken by the conveyer belt 25 round the base 43 of a rotating creel and winding machine, Fig. 9. A weft thread (not shown) passing down a slot 67, Fig. 7, and up through an eye 69 has its end blown up by an air jet 66 and drawn into the base of a driver 50 by suction applied at 65 ; the conveyer belt 25 then presses a spool 33 against the driver, thereby trapping the thread. As the winding machine continues to rotate about its axis, the spool is rotated by a barrel 54 rolling on a fixed rubber track 63, the length of which is adjusted to wind sufficient weft for one pick on to the spool. Before the conveyer belt takes the spool away from the machine, the weft is cut between the spool and the eye 69 by a rotating blade (not shown) operating in a slot 72, Fig. 13, the end attached to the spool being inserted in a notch (not shown) in the conveyer belt 25. Stop motions:-Before being cut at the slot 72, Fig. 13, the loop of weft (consisting of a limb a coming from the creel and a limb b wound on the spool) slides along a channel member 71 in which is pivoted an arm 136; if the loops are intact, each loop supports the arm before the preceding loop clears it, but if a loop is broken or missing, the arm drops to close a switch 138. If a spool in the shed fails to accompany its driving magnet, it will foul the beat-up blades, and is pressed by them against an insulated contact bar 141, Fig. 15.